Pneumatic rock drill
CA 2517650 C · Owner: Sulzer Pumps (South Africa) (Pty) Ltd. · Inventors: Jones, Stephen Edwin; Creswell, James; Davies, Michael Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a pneumatic rockdrill (99) comprising: a housing including an air supply inlet for receiving compressed air and a cylinder , (50), connected to the air supply inlet by a set of air passages; an impact piston (14), at least part of which is reciprocable within the cylinder (50); and air-flow control means for controlling the supply of compressed air from the air supply inlet to the cylinder (50); the rockdrill (99) including at least one pair of corresponding contact surfaces at which relatively-moving parts contact one another; and the rockdrill being characterized by including at least one water supply inlet and water paths connected to the water supply …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 15, 2004 and granted May 1, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.